code: def setUp(self, n, k):
      self.n = n
      self.k = k
  
file_path: pfrl/tests/utils_tests/test_random.py
imports: import timeit
  import unittest
  import numpy
  import pytest
  from scipy import stats
  from pfrl.utils.random import sample_n_k
label_desc: Use image node_id 1 for calling the TestSampleNK obj's underlying member method code with example usage: obj.setUp(n, k) without return types